Enabling Text Message Reminders Using Modern Events Calendar by Webnus

            <?php

class DsaMecSms
{
    const ACCOUNT_SID = 'XXX';
    const AUTH_TOKEN = 'XXX';
    const TWILIO_PHONE_NUMBER = '+19704271234'; // Your Twilio phone number
    const TWILIO_API_URL = 'https://api.twilio.com/2010-04-01/Accounts';

    const DSA_SMS_DEBUG = true;

    private $postData;

    public function __construct($postData)
    {
        $this->postData = $postData;
    }

    public function processBooking()
    {
        try {
            $bookingData = $this->postData;

            if (self::DSA_SMS_DEBUG) {
                $this->logToFile("Received Booking Data: " . print_r($bookingData, true));
            }

            $bookingId = $bookingData['id'] ?? null;
            $eventTitle = $bookingData['event']['title'] ?? 'Unknown Event';
            $startDate = $bookingData['start'] ?? 'Unknown Start Date';
            $endDate = $bookingData['end'] ?? 'Unknown End Date';

            if (self::DSA_SMS_DEBUG) {
                $this->logToFile("Processing event: $eventTitle, Booking ID: $bookingId");
            }

            $attendees = $bookingData['attendees'] ?? [];
            foreach ($attendees as $attendee) {
                $attendeeName = $attendee['name'] ?? 'Unknown Name';
                $phoneNumber = $attendee['fields'][0]['value'] ?? null;

                if (!$phoneNumber) {
                    $this->logToFile("Skipping attendee due to missing phone number.");
                    continue;
                }

                $this->sendConfirmationMessage($attendeeName, $eventTitle, $startDate, $phoneNumber);
            }
        } catch (Exception $e) {
            $this->logToFile("Error in processBooking: " . $e->getMessage());
            throw $e;
        }
    }

    private function sendConfirmationMessage($name, $event, $start, $phone)
    {
        $message = $this->generateConfirmationMessage($name, $event, $start);

        if (self::DSA_SMS_DEBUG) {
            $this->logToFile("Sending Message: $message to $phone");
        }

        $this->sendSMS($phone, $message);
    }

    private function generateConfirmationMessage($name, $event, $start)
    {
        $eventDate = date('l, F j, Y', strtotime($start));
        $eventTime = date('g:i A', strtotime($start));
        $eventLocation = "Student Resolution Center";

        return sprintf(
            "Workshop reminder: %s on %s at %s with the Student Resolution Center. Call 970-491-7165 to cancel.",
            $event,
            $eventDate,
            $eventTime
        );
    }

    private function sendSMS($toPhone, $message)
    {
        $url = sprintf(
            "%s/%s/Messages.json",
            self::TWILIO_API_URL,
            self::ACCOUNT_SID
        );

        $postFields = http_build_query([
            'To' => $toPhone,
            'From' => self::TWILIO_PHONE_NUMBER,
            'Body' => $message,
        ]);

        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_USERPWD, self::ACCOUNT_SID . ':' . self::AUTH_TOKEN);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);
        curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/x-www-form-urlencoded']);

        $response = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);

        if ($httpCode != 201) { // Twilio returns 201 for successful message creation
            $this->logToFile("Failed to send SMS to $toPhone. Response: $response");
            throw new Exception("Error sending SMS: $response");
        }

        $this->logToFile("SMS sent successfully to $toPhone.");
    }

    private function logToFile($message)
    {
        $logFile = __DIR__ . '/mec-booking-data.log';
        file_put_contents($logFile, date('[Y-m-d H:i:s] ') . $message . PHP_EOL, FILE_APPEND);
    }
}


// Prevent the entry-point code from running if included directly
if (!defined('DSA_SMS_SCRIPT')) {
    header('Content-Type: application/json');
  
    try {
        $input = $_POST;
        if (empty($input)) {
            $input = json_decode(file_get_contents('php://input'), true);
        }
        if (!$input) {
            throw new Exception("Invalid or missing input data");
        }
  
        $dsaMecSms = new DsaMecSms($input);
        $dsaMecSms->processBooking();
  
        echo json_encode(['status' => 'success', 'message' => 'Booking processed successfully.']);
    } catch (Exception $e) {
        http_response_code(400);
        echo json_encode(['status' => 'error', 'message' => $e->getMessage()]);
    }
  
    exit; // Prevent further execution
  }